A dataset provided by the European Space Agency

URL ftp://npsa01.esac.esa.int/pub/mirror/CASSINI-HUYGENS/SSP/HP-SSA-SSP-3-4-DESCENT-V1.0
DOI 10.5270/esa-4n85wty
Abstract N/A
Description Data Set Overview = This archive contains science data products from observations acquired by the Huygens Probe Surface Science Package (SSP) instrument during the Descent of the Huygens Probe on 2005/01/15 as well as on the surface. SSP data products include raw data and calibration tables. This volume contains both. Descent data can be found in the /DATA/DESCENT/RAW directory. All data are organised by sensor (housekeeping data being treated like all other sensors), with the exception of the impact event which, for reasons of preserving the original data structure, is in a separate directory. SSP consists of nine sensors which are described in INST.CAT. In addition, housekeeping data and a special data packet on impact were created. The corresponding subdirectories are therefore ACCE ACCI APIS APIV DEN HK IMPACT PER REF THP TIL The /CALIB directory contains the necessary calibration information to convert the raw data from Voltages or A/D counts respectively to scientifically meaningful quantities. Given the calibration information alone, a conversion is possible. Should a clarification be required, please consult EAICD.DOC or SSP_SUM.DOC, both in the DOCUMENTS directory. DEN and PER (and, to some extent, also REF) have worked throughout the descent, but these sensors were not designed with the objective of atmospheric measurements in mind. Therefore the related data may only be of limited use. TIMING SSP times are given with with reference to the DDB 'T0' event, based on the Huygens on-board clock (see INSTHOST.CAT). At the time of archiving there appears to be an additional 250ms offset w.r.t. UTC pending verification. DATASET ORGANISATION Files on this volume are organized into a series of subdirectories below the top-level directory. The following table shows the structure and content of these directories. In the table, directory names are enclosed in square brackets ([]). FILE CONTENTS Top-leve...
Instrument SSP
Temporal Coverage 2005-01-14T09:10:21Z/2005-01-14T12:47:46Z
Version V1.0
Mission Description The majority of the text in this file was extracted from the Cassini Mission Plan Document, D. Seal, 2003. [JPLD-5564] The Cassini spacecraft, including the Huygens Probe, was launched on 15 October 1997 using a Titan IV/B launch vehicle with Solid Rocket Motor Upgrade (SRMU) strap-ons and a Centaur upper stage. The spacecraft used a 6.7-year Venus-Venus-Earth-Jupiter Gravity Assist (VVEJGA) trajectory to Saturn, during which cruise observations were conducted to check out, calibrate, and maintain the instruments as well as to perform limited science. After Saturn Orbit Insertion (SOI) (1 July 2004), the Huygens Probe separated and, on the third encounter with Titan, entered the satellite's atmosphere to make in situ measurements during an approximately 150 minute descent (14 January 2005). The Orbiter continued a tour of the Saturn system until mid-2008 collecting data on the planet and its satellites, rings, and environment. The Cassini Orbiter (CO) was a three-axis stabilized spacecraft equipped with one high gain antenna (HGA) and two low gain antennas (LGAs), three Radioisotope Thermoelectric Generators (RTGs) for power, main engines, attitude thrusters, and reaction wheels. It carried twelve orbiter instruments designed to carry out 27 diverse science investigations. The Huygens Probe (HP) was equipped with six instruments designed to study the atmosphere and surface of Titan. It entered the upper atmosphere protected by a heat shield, then deployed parachutes to descend slowly to the surface from an altitude of about 200 km. The instruments, with acronym and Principal Investigator (PI) or Team Leader (TL), are summarized below: Instrument Acronym PI/TL ----------------------------------------------- -----------Orbiter: Cassini Plasma Spectrometer CAPS Young Cosmic Dust Analyzer CDA Srama Composite Infrared Spectrometer CIRS Flasar Ion and Neutral Mass Spectrometer INMS Waite Imaging Science Subsystem ISS Porco...
Creator Contact AXEL HAGERMANN
Date Published 2006-04-18T00:00:00Z
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, 2006-04-18T00:00:00Z, HP-SSA-SSP-3-4-DESCENT, V1.0. https://doi.org/10.5270/esa-4n85wty